Deuteron capture in 3He

doi:10.1016/0375-9474(68)90218-2

Nuclear Physics A

Volume 112, Issue 1, 3 May 1968, Pages 47-64

https://doi.org/10.1016/0375-9474(68)90218-2 Get rights and content

Abstract

Gamma-ray spectra from the ³He(d, γ)⁵Li reaction, measured over the range E_d = 0.2−1.2 MeV with a high resolution NaI two-crystal pair spectrometer, consist of transitions to the ⁵Li ground state (Γ = 2.6±0.4 MeV) and first excited state (E_x = 7.5±1.0 MeV). The intensity ratios of the two lines is 1.00±0.15 and 1.9±0.4 at E_d = 480 and 1025 keV, respectively.

The 90° ground-state transition yield curve shows a resonance at E_d = 450 keV (Γ_γ0 = 5±1 eV) with a total cross section of 21±4 μb. At higher energies the reaction proceeds mainly through non-resonant capture.

The ground-state angular distributions were measured at 480 and 1025 keV.

The results are consistent with the assumption of pure s-wave capture through a resonance reaction with channel spin $32$ and a direct reaction with channel spin $12$ . The measured spin orbit splitting of the two p-levels in ⁵Li agrees within experimental errors with the value extrapolated from measured spin-orbit splitting energies of higher-Z nuclei.

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Citation Excerpt :
In addition, the maximum of the calculated cross section in the 3 MeV region is lower than the data given by Ref. [8], which can be explained by the inaccuracy of the spectra [19] known for the authors of Ref. [8], but used by us today [18]. In both cases, the results of [7] and [8] require refinement on the basis of modern methods of experimental measurements. We note that the experimental error of the cross sections given in Fig. 3 was taken to be 19%, as indicated by [7] for an energy of 450 keV in l.s. or 270 MeV in c.m. and the cross section 21(4) μb with an error of 15 keV for the center-of-mass energy.
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^†: Now at Linear Accelerator Laboratory, University of Saskatchewan, Saskatoon,Canada.

^††: Now at Laboratoire de Physique Nucléaire, Université de Montreal, Montreal, Canada.

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Nuclear Physics A

Abstract

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